Governor for explosion-engines.



N. T. HARRINGTON.

GOVERNOR FOR EXPLOSION ENGINES. APPLICATION FILED JAN. 27, 1908.

1,036,617 Patented Aug. 27, 1912.

I'm e72 for frormanrh'a 272 01 0)? Wifn esszs NORMAN T. HARRINGTbN, 0F LANSING, MICHIGAN.

GOVERNOR FOR EXPLOSION-ENGINES.

panying drawings.

The invention relates more particularly to explosion engines of the four-cycle type, and it is the objectof-the invention to obtain a simple construction of throttle governing means, avoiding the complications due to the peculiar timing of the valves required for engines of this type.

In the operations of engines of the above type, the admission valve is opened but once during the cycle of'the two revolutions of the crank, and generally remains open for more than one-quarter of this cycle. It is therefore difficult to adapt a simple governing mechanism suchas may be employed for steam engines for controlling and properly timing the operation of this admission valve. On the other hand, the admission valve of an explosion engine may be operated automatically by the suction of the enginepiston ifthe same quantity of explosive mixture-is taken into the cylinder at each suction stroke. ith the present invention the governing mechanism, as simple in its construction as that employed for a steam engine, is combined to cooperate with a properly timed inlet valve to vary the quantity of the explosive mixture introduced into the cylinder.

In the drawings, Figure 1 is a diagrammatic illustration of my improved governing mechanism; Fig.2 is a diagram illustrating the principle of operation.

A is the cylinder of an explosion engine, B the piston, and C the admission valve, which may be of any suitable construction,

. but, as shown, consists of a' spring closed automatic valve. v.

D, is a second valve controlling the flow of the explosive mixture through the inlet conduit E and this, as shown, is a rotary valve which is opened by movement in either direction from a neutral position. I

F is the crank shaft of the engine, G the fly Wheel thereon, and H a centrifugal governor of any suitable construction and con- Specification of Letters Patent.

Patented Aug. 27, 1%12.

Application filed January 27, 1908. Serial No. 412,833.

trolling an eccentric I which operates the rod J connected to the valve D.

WVith the above described construction, in operation the valve "D Will be opened and closed by the operation of the eccentric I and rod J at regular intervals, being twice opened and twice closed in each cycle of the engine. On the other hand, the valve C will be opened but once in each cycle and for a period riod in which the valve D is opened. The di'tlerence in the timing of the operation of which is in excess of any one pe-' the two valves Will not however interfere with the introduction of a full charge of the explosive mixture into the engine cylinder, as the valve D only closes momentarily, and will be reopened again during the open period of the valve C. The result is that during the instant of the closure of the valve D there is only a temporary reduction in the pressure of the gases in the engine cylinder, but upon the reopening of said valve the full pressure is quickly restored and the full charge introduced into the cylinder.

In the operation as just described, it has been assumed that the engine is running at normal speed, and that the governing mechanism is not in action. Whenever the speed of the engine is accelerated there will be an adjustment of the portion of the eccentric I due to the operation of the centrifual governorH, and this will diminish the amplitude of the movement of the valve D so as to restrict the flow of gas through the conduit E. Any degree of restriction may be effected to the point Where the cocentric I becomes concentric with the axis of the shaft F and the valve D is completely closed. A different relative timing effect for the two valves C and D may be obtained by an adjustment of the normal position of the eccentric about the shaft F,

but I preferably make such an adjustment stroke and after the'temporary closure of the valve.

The-mechanism described will produce agoverning effect which for allpractical purposes is as exact as could be obtained by a direct control of the admission valve C and by means of the complicated mechanism necessary for the variable Operation of this valve.

On the diagram, Fig. 2, the line a-b represents one, complete cycle of the operation of the engine. The heavy line between the points a (1 indicates the timing of the movement of the operation of the exhaust valve, and the heavy line a between the points 01 and 7 indicates the operation of the admission valve, while the heavy line between the points 1 and 6 indicates the period in which both inlet and exhaust valves are closed.

The light line 9 indicates the operation of the controlling valve D by the eccentric I and, as illustrated, this valve is closed at regular intervals at the points a, h, i, 9' and tion with a periodically-opening admission valve, of a constantly moving valve controlling the same conduit having merely an instantaneous closure intermediate its open periods, an eccentric for operating said valve, and means for varying'the throw of saideccentric.

3. In an explosion engine, the combination with a periodically-opening admission valve, of a valve controlling the same conduit continuously operating with a simple harmonic movement having merely an instantaneous closure at the point of greatest acceleration in its movement, and means for vafying the amplitude of movement of said va ve.

4. In an explosion engine, the combination with a periodically-opening admission valve, of a continuously moving oscillating Valve controlling the same conduit having an instantaneous closure at the center of its oscillation, and means for varying the amplitude of oscillation.

5. In anexplosion engine, the combination with an admission valve, of a valve controlling the same conduit adapted to be .opened by a movement in either direction from a neutral pos1t1on, an eccentric for operating said valve alternately upon opposite sides of its neutral position, and centrifugal operating means for varying the throw of said eccentric.

6. In-an explosion engine, the combina-- tion with an admission valve, ofa valve controlling the same conduit adapted to be opened by a movement in either direction from a neutral pbsition, and an eccentric for operating saidvalve alternately upon opposite sides of its neutral position.

7. In an explosion engine, the combination with a main admission valve, of an adjustably controlled oscillating valve controlling the same conduit having an instantaneous closure at the centerof its oscillation in all positions of control adjustment.

8. In an explosion engine, the combination with a main admission valve, of an oscillating valve controlling the admission to I said main valve having in each direction of movement a plurality of open periods and an instantaneous closure intermediate such open periods.

In testimony whereof I aflix my signature in presence of two witnesses.

NORMAN 'r. HARRINGTON.

Witnesses:

' NELLIE KINSELLA, J AMn's P. BARRY. 

